21400301983 has 2 divisors, whose sum is σ = 21400301984. Its totient is φ = 21400301982.

The previous prime is 21400301957. The next prime is 21400302023. The reversal of 21400301983 is 38910300412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21400301983 - 2²¹ = 21398204831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21400301183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10700150991 + 10700150992.

It is an arithmetic number, because the mean of its divisors is an integer number (10700150992).

Almost surely, 2^21400301983 is an apocalyptic number.

21400301983 is a deficient number, since it is larger than the sum of its proper divisors (1).

21400301983 is an equidigital number, since it uses as much as digits as its factorization.

21400301983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 21400301983 in words is "twenty-one billion, four hundred million, three hundred one thousand, nine hundred eighty-three".